Meet and talk with real estate agents.

You might talk with a real estate/estate attorney and see if it's possible to open a probate, have a Personal Representative appointed and obtain an order from the court authorizing the sale of the property by the PR with the proceeds being deposited into the registry of the court for later distribution when all the heirs are identified. 

@Chris Harwood, You will need to purchase real estate with your 1031. 

I'm Doug from Brooklyn, NY, passionate about real estate investing for a few years now.

Any insights or resources would be greatly appreciated!

Have an excellent referral and resource for 5-10 units.

Can I get some advice on military friendly lenders with low down payment for purchasing rental property without using the VA loan or in general, how to navigate this to start my rental property real estate journey?

They are the lifeblood of your property, like all investment real estate.  

Another out-of-town real estate enthusiast, using local comparables, estimated an After Repair Value (ARV) of $40,000 with high confidence.

But I think you answered my questionHaving been in real estate for almost 30 years.